From VZW's site... (This just explains *228 Option 2. *228 Option 1 is the initial programing that you or the store does when you first get your phone)
Questions & Answers
Why do I need to perform this update on my wireless phone?
By performing this update your phone will stay on the Verizon Wireless network and/or digital service whenever possible. Also, for most price plans after 2/1/2002 the phone roam indicator will turn off/on in accordance to the price plan you have chosen.
What are the steps I need to take to complete this update?
The following are the steps you need to take to complete the update:
Power on your Verizon Wireless phone.
Dial *228 from your home digital coverage area, followed by the SEND key.
When prompted, press option #2, to update your phones roaming capabilities (This process may take up to 2 minutes).
Once completed, a confirmation message will be played, and a message will display on the phone screen.
What if the update fails to complete successfully?
If for some reason the update does not complete successfully, please try again at a later time. If the problem persists, your phone may not be capable of this update process.
What benefits will this update provide?
Benefits of this update include a roaming indicator that will reflect the price plan you have chosen (available on most price plans after 2/1/2002).
How often do I need to perform this update?
This update should be performed every three months, and/or after changing price plans.
How much will this *228 call cost me?
This call is offered FREE of airtime charges from Verizon Wireless.
When can I perform this update?
You may perform this update at your convenience. This FREE software update is available to you 24 hours a day, seven days a week!